JP5973802B2 - Grinding equipment - Google Patents

Description

  The present invention relates to a grinding apparatus.

As a grinding wheel for grinding a processed surface, there is one in which an annular grindstone member is externally fitted to the outer peripheral surface of a disk member (see, for example, Patent Document 1).
In such a grinding wheel, the processed surface can be ground by rotating the circular center of the disc member around the rotation center and bringing the outer peripheral surface of the grindstone member into contact with the processed surface. Moreover, when a processed surface is concave shape, a processed surface can also be ground with the side surface of a grindstone member.

JP-A-5-31674

  In the conventional grinding wheel described above, since the grinding liquid is difficult to enter between the side surface of the grindstone member and the processed surface, the temperature of the processed surface easily rises excessively. Therefore, by spraying a high pressure and a large amount of grinding liquid between the side surface of the grindstone member and the processing surface using the injection nozzle, the grinding liquid is infiltrated between the side surface of the grindstone member and the processing surface. There is a problem that a large amount of supply of the grinding fluid is required and generation of mist increases.

  An object of the present invention is to solve the above-described problems and to provide a grinding apparatus capable of efficiently supplying a grinding fluid to a grinding wheel and reducing the supply amount of the grinding fluid and generation of mist. To do.

In order to solve the above-described problems, the present invention provides a grinding wheel including a disk member and an annular grindstone member provided on an outer peripheral edge of the disk member, and a supply device for supplying a grinding liquid to the grinding wheel. A liquid supply hole penetrating from one side surface to the other side surface is formed in the disk member, and the liquid supply hole is formed at an outer peripheral edge portion of the one side surface. An inflow port that is open to the other side surface than the opened discharge port is formed on the inner side in the radial direction of the disk member, and in the other side surface, the inflow direction of the disk member is larger than the inflow port. The outer portion is formed with a peripheral wall portion raised along the outer peripheral edge portion of the disk member, and the supply device is arranged on the other side in the radial direction of the disk member from the peripheral wall portion. A liquid supply flow path provided with a jet port facing the side surface; and a surface of the peripheral wall portion; Opposite the serial other side has a wall part which covers the stepped portion between the other side surface and the peripheral wall portion, the supply device protrudes toward the other side surface of the disc member A protrusion is formed on the grinding device.

  According to the above configuration, the grinding fluid reflected from the side surface of the disk member can be dammed by the wall portion of the supply device and returned to the side surface, so that the grinding liquid is supplied between the supply device and the peripheral wall surface of the disk member. It is possible to suppress scattering from the gap to the outside and efficiently guide to the inflow port. Therefore, the grinding fluid can be efficiently supplied to the grinding wheel, and the supply amount of the grinding fluid and the generation of mist can be reduced. Further, in the above configuration, when the grinding liquid is supplied to the inside of the peripheral wall portion of the side surface of the disk member while rotating the grinding wheel around the center of the circle of the disk member, the grinding liquid has a diameter on the side surface by centrifugal force. It flows toward the outside in the direction and is dammed to the peripheral wall. The grinding fluid accumulated inside the peripheral wall portion flows into the liquid supply hole from the inlet formed inside the peripheral wall portion, and is discharged from the discharge port on the opposite side surface to the outer peripheral edge portion of the disk member. . Therefore, the supply amount of the grinding fluid and the generation of mist can be further reduced.

Invention, a portion of the side wall surface of the front Symbol protrusions, said than spout located on the center side of the disc member and faces the inner peripheral wall surface of the peripheral wall section according to claim 2 It is characterized by. According to such a configuration, the grinding fluid reflected from the side surface of the disk member is returned to the vicinity of the inflow port on the side surface, so that the grinding fluid scatters from the center side to the outside through the gap between the supply device and the other side surface. And the grinding fluid can be efficiently guided to the inlet.

  According to a third aspect of the present invention, the distance between the side wall surface of the protrusion and the peripheral wall surface of the protrusion is shortened as the disk member advances in the rotation direction of the disk member toward the workpiece processing position. A grinding fluid guiding surface is formed. According to such a configuration, since the pressure around the grinding fluid is increased by the grinding fluid guide surface, the grinding fluid can easily flow into the inlet, and the amount of the grinding fluid supplied to the fluid supply hole can be increased.

  According to the grinding wheel of the present invention, the grinding fluid can be sufficiently supplied to the grinding wheel, and the supply amount of the grinding fluid and the generation of mist can be reduced.

It is sectional drawing which showed the grinding apparatus which concerns on 1st embodiment of this invention. It is the top view which showed the grinding wheel. It is the top view which showed the grinding apparatus which concerns on 1st embodiment of this invention. It is sectional drawing which showed the grinding device which concerns on 2nd embodiment of this invention. It is the top view which showed the grinding apparatus which concerns on 2nd embodiment of this invention. It is sectional drawing which showed the grinding device which concerns on 3rd embodiment of this invention.

  Embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In the description of each embodiment, the same constituent elements are denoted by the same reference numerals, and redundant descriptions are omitted.

(First embodiment)
As shown in FIG. 1, the grinding device 1a according to the first embodiment includes a grinding wheel 2 and a supply device 3a. The supply device 3 a is a device that supplies a grinding liquid to the grinding wheel 2. The grinding wheel 2 includes a disc member 10 and an annular grindstone member 20 attached to the outer peripheral edge portion of the lower surface 10A (one side surface) of the disc member 10.

  The disk member 10 is a member that rotates about the center of the circle as a center of rotation by connecting the rotation shaft 4 to the center. The disk member 10 is a metal part using steel or the like and has sufficient rigidity.

As shown in FIGS. 1 and 2, a peripheral wall portion 11 is formed on the outer peripheral edge portion of the upper surface 10 </ b> B (the other side surface) of the disc member 10. The peripheral wall portion 11 is raised along the outer peripheral edge portion of the disk member 10. Specifically, the peripheral wall portion 11 is raised in the normal direction of the upper surface 10B (upward direction in FIG. 1). The inner peripheral surface 12 of the peripheral wall portion 11 (the inner peripheral wall surface of the peripheral wall portion 11) was reduced in diameter from the proximal end side (lower side in FIG. 1) to the distal end side (upper side in FIG. 2). It is formed with an inversely tapered inclined surface. A wedge-shaped corner is formed by the upper surface 10 </ b> B of the disk member 10 and the inner peripheral surface 12 of the peripheral wall portion 11. A boundary portion between the peripheral wall portion 11 and the upper surface 10B constitutes a step portion 13.
The inner peripheral surface of the peripheral wall portion is not limited to the inclined configuration, and may be perpendicular to the surface of the peripheral wall portion.

  The disc member 10 has a liquid supply hole 15 penetrating from the lower surface 10A (one side surface) to the upper surface 10B (the other side surface). The liquid supply hole 15 is a flow path for guiding and supplying the grinding liquid to the processing position P of the workpiece W. The liquid supply hole 15 includes a discharge port 16 opened at the outer peripheral edge of the lower surface 10A and an inlet 17 opened at the upper surface 10B. The liquid supply hole 15 is configured by a through hole having a circular cross section that is formed in a straight line from the lower surface 10A to the upper surface 10B. The inflow port 17 is formed inside the radial direction of the disc member 10 with respect to the discharge port 16. That is, the liquid supply hole 15 is formed so as to be inclined so as to proceed to the outside of the disk member 10 from the inlet 17 toward the discharge port 16. In the present embodiment, the inclination angle of the liquid supply hole 15 coincides with the inclination angle of the inner peripheral surface 12 of the peripheral wall portion 11.

The inflow port 17 is formed in the radially inner portion of the disc member 10 with respect to the peripheral wall portion 11. The inflow port 17 is opened on the upper surface 10 </ b> B so that the outer peripheral line is in contact with the inner peripheral surface 12 of the peripheral wall portion 11. As a result, the inner peripheral surface 12 of the peripheral wall portion 11 and the outer surface of the liquid supply hole 15 are connected in a straight line (see FIG. 1), so that the grinding fluid flows smoothly into the liquid supply hole 15.
A plurality of liquid supply holes 15 are formed and arranged at equal intervals in the circumferential direction of the disk member 10 (see FIG. 2).

  As shown in FIG. 2, the grindstone member 20 is a cylindrical grindstone. In this embodiment, a CBN (cubic boron nitride) grindstone is used, but the material is not limited, and various known grindstones can be used. The upper end surface of the grindstone member 20 is fixed to the outer peripheral edge portion of the lower surface 10 </ b> A of the disc member 10. The outer peripheral diameter of the grindstone member 20 is equal to the outer peripheral diameter of the disc member 10.

  As shown in FIG. 3, the supply device 3 a sprays the grinding liquid onto the upper surface 10 </ b> B of the disk member 10 on the upstream side in the rotational direction from the contact position (work processing position P) between the grindstone member 20 and the work W. . The cross-sectional view of FIG. 1 is a cross-sectional view taken along the bent line AA in FIG. 3, and the ejection port 31 and the workpiece processing position P are provided in different phases (see FIG. 3). The supply device 3a is attached to a fixed-side support member (not shown) on which the rotating shaft 4 is rotatably supported, or is formed integrally with the support member.

  As shown in FIG. 1 and FIG. 3, the supply device 3 a includes a liquid supply channel 30 having a jet port 31 facing a position in the vicinity of the inlet 17 on the upper surface 10 </ b> B of the disc member 10, and the periphery of the jet port 31. And a wall portion 32 that covers the step portion 13 between the peripheral wall portion 11 and the upper surface 10B. The main body 33 of the supply device 3a is formed in a cylindrical block shape, and is disposed so as to surround the rotating shaft 4 and cover the upper surface 10B and the peripheral wall 11 of the disk member 10 from above.

  An air seal groove 34 a is formed on the inner peripheral surface 34 of the main body 33 so as to surround the rotation shaft 4, and air is pumped from the air supply hole 34 b to the air seal groove 34 a, so that the outer periphery of the rotation shaft 4 is formed. An air seal is formed between the surfaces.

  A protruding portion 36 that protrudes toward the upper surface 10 </ b> B of the disk member 10 is formed on the bottom surface 35 of the main body portion 33. The protruding portion 36 is formed in a cylindrical shape so as to be located on the center side of the disk member 10. The protruding portion 36 protrudes below the upper surface of the peripheral wall portion 11, and the lower end surface of the protruding portion 36 is close to the upper surface 10 </ b> B of the disk member 10. The side wall surface 37 on the outer side of the projecting portion 36 is opposed to the inner peripheral surface 12 (the inner peripheral wall surface of the peripheral wall portion 11) of the peripheral wall portion 11 over the entire periphery. A cutout portion 38 a having a U-shaped cross section is formed in a part of the side wall surface 37 of the protruding portion 36. The notch 38a has a semicircular tip at the cross section. The supply device 3a is disposed so that the notch 38a is positioned on the upstream side in the rotation direction of the grinding wheel 2 with respect to the workpiece processing position P on the disc member 10. A spout 31 is open on the bottom surface 35 of the main body 33 at the position cut out by the cutout 38a. In short, a part of the side wall surface 37 of the protrusion 36 (the surface 37a at the back of the notch 38a) is located closer to the center of the disk member 10 than the jet port 31, and the inner wall of the peripheral wall 11 is located at that position. It faces the peripheral surface 12 (inner peripheral wall surface).

  The inner diameter dimension of the protruding portion 36 is the same as the inner diameter dimension of the main body portion 33, and the side wall surface (inner peripheral surface) inside the protruding portion 36 is the same cylindrical surface as the inner peripheral surface 34 of the main body portion 33. Yes.

  The liquid supply flow path 30 is formed in a straight line from the outer peripheral surface of the main body 33 to the center side in a straight line and a straight line upward from the bottom surface 35 of the main body 33. The second hole 30b is formed of a bent through hole having a circular cross section that communicates with the inside of the main body 33. One end of the liquid supply flow path 30 constitutes a jet 31, and the other end of the liquid supply flow path 30 is connected to a grinding liquid supply source (not shown). The spout 31 is opened on the bottom surface 35 so that the outer peripheral line thereof is in contact with the inner surface 37b (a part of the side wall surface 37) of the notch 38a.

  The wall portion 32 covering the step portion 13 faces the both surfaces of the upper surface (front surface) of the peripheral wall portion 11 and the upper surface 10B of the disk member 10 in parallel. The wall portion 32 is configured by a bottom surface 35 around the ejection port 31. The wall portion 32 is arranged with a predetermined small gap (a gap that allows the disc member 10 to rotate and the grinding fluid does not scatter to the outside) from the upper surface of the peripheral wall portion 11. Together with this, the jet nozzle 31 is surrounded by the wall surface of the notch 38a. Therefore, the spout 31 is surrounded by the wall portion 32, the wall surface of the notch portion 38 a, the wall surface of the step portion 13 (inner peripheral surface 12 of the peripheral wall portion 11), and the upper surface 10 </ b> B of the disk member 10.

  According to the grinding apparatus 1a having the above-described configuration, as shown in FIG. 3, while rotating around the center of the circle of the disc member 10 as the center of rotation, it is perpendicular to the upper surface 10B from the outlet 31 of the supply device 3a. When the grinding fluid is sprayed onto the disk member 10, it flows toward the inlet 17 while spreading in the circumferential direction of the disk member 10 by centrifugal force.

  At this time, a part of the grinding liquid sprayed on the upper surface 10B is reflected on the upper surface 10B of the disk member 10, but in this embodiment, the ejection port 31 includes the wall portion 32 and the notch portion 38a. Since it is surrounded by the wall surface, the wall surface of the step portion 13 (the inner peripheral surface 12 of the peripheral wall portion 11), and the upper surface 10B of the disk member 10, scattering of the grinding fluid can be suppressed.

Specifically, the grinding liquid reflected on the bottom surface 35 of the supply device 3a is dammed up by the wall 32 or the like and returned to the upper surface 10B. Thereby, it is possible to prevent the grinding fluid from scattering from the gap between the bottom surface 35 of the supply device 3a and the upper surface of the peripheral wall portion 11 of the disk member 10 to the outside (the outer peripheral side of the supply device 3a).
In addition, since the protruding portion 36 is formed in the supply device 3a, the grinding liquid reflected on the inner peripheral side (rotary shaft 4 side) of the supply device 3a dams the side surface of the protruding portion 36 (the wall surface of the notch portion 38a). It is stopped and returned to the upper surface 10B. Thereby, it is possible to prevent the grinding fluid from scattering from the gap between the supply device 3a and the upper surface 10B of the disk member 10 to the outside (the inner peripheral side (rotation shaft 4 side) of the supply device 3a). Furthermore, since an air seal is formed between the liquid supply device 3a and the rotary shaft 4, it is possible to reliably prevent the grinding fluid from splashing outside through the gap between the supply device 3a and the rotary shaft 4.

  Then, the grinding liquid dammed up by the wall portions 32 and the wall surfaces of the notch portions 38a falls to the upper surface 10B of the disk member 10 due to gravity, and is guided to the inlet 17 by the centrifugal force of the disk member 10. The On the other hand, the grinding fluid blocked by the wall surface of the stepped portion 13 is directly guided to the inlet 17 by the centrifugal force of the disc member 10.

  As described above, the grinding fluid reflected by the upper surface 10B of the disk member 10 is guided to the inlet 17 through the upper surface 10B or directly from the wall surface of the step portion 13. That is, according to the grinding apparatus 1a having the above-described configuration, the grinding liquid can be prevented from scattering to the outside, and can be efficiently guided to the inlet 17. Therefore, since the grinding liquid can be efficiently supplied to the grindstone member 20, the supply amount of the grinding liquid and the generation of mist can be reduced.

  Furthermore, in the grinding apparatus 1a having the above-described configuration, when the grinding liquid is supplied to the inside of the peripheral wall portion 11 of the disk member 10 while rotating the grinding wheel around the center of the circle of the disk member 10, the grinding liquid is subjected to centrifugal force. As a result, the air flows on the upper surface 10B toward the outside in the radial direction, and is dammed to the peripheral wall portion 11. The grinding fluid accumulated inside the peripheral wall portion 11 flows into the liquid supply hole 15 from an inlet 17 formed on the inner side of the peripheral wall portion 11, and the outer peripheral edge portion of the disc member 10 from the discharge port 16 of the lower surface 10A. Discharged. Therefore, waste of the grinding fluid can be reduced, and the supply amount of the grinding fluid and generation of mist can be further reduced.

(Second embodiment)
As shown in FIGS. 4 and 5, the grinding apparatus 1b according to the second embodiment is different from the supply apparatus 3a of the first embodiment in the configuration of the supply apparatus 3b. The configuration of the grinding wheel 2 is the same as in the first embodiment. The supply device 3b differs from the first embodiment in the shape of the notch 38b. 4 is a cross-sectional view taken along line B-B in FIG. 5, and the ejection port 31 and the workpiece machining position P are provided in different phases (see FIG. 5). In the cross-sectional line of FIG. 4, the leftmost outermost side wall surface 37 is not actually visible, but is illustrated with a virtual line (two-dot chain line) for explaining a grinding fluid guiding surface 39 to be described later. Yes.

The cutout portion 38b of the second embodiment is formed such that a side wall surface at one end in the width direction (a side wall surface on the downstream side in the rotation direction of the disk member 10) extends in the circumferential direction. Specifically, of the side wall surface 37 of the projecting portion 36, the distance between the side wall surface 37 b at the back of the notch 38 b and the inner peripheral surface 12 (peripheral wall surface) of the peripheral wall portion 11 is the periphery of the spout 31. The side wall surface 37b of the notch portion 38b is shortened as it advances in the rotational direction of the disk member 10 toward the periphery of the workpiece machining position P (the side wall surface 37b gradually approaches the inner peripheral surface 12). Is formed. In this way, the side wall surface 37 b that gradually approaches the inner peripheral surface 12 of the peripheral wall portion 11 constitutes the grinding fluid guiding surface 39. The grinding fluid guiding surface 39 is a curved surface smoothly connected from the innermost surface (the inner surface on the upstream side in the rotation direction) of the notch 38 b toward the outermost side wall surface 37 of the protrusion 36. The grinding liquid guiding surface 39 is connected to the outermost side wall surface 37 of the protrusion 36 in the vicinity of the workpiece processing position P.
Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

  According to the grinding apparatus 1b having the above-described configuration, as shown in FIG. 5, while rotating around the center of the circle of the disc member 10 as the center of rotation, it is perpendicular to the upper surface 10B from the outlet 31 of the supply device 3a. When the grinding fluid is sprayed onto the disk member 10, it flows toward the inlet 17 while spreading in the circumferential direction of the disk member 10 by centrifugal force.

At this time, also in 2nd embodiment, the effect similar to 1st embodiment is acquired. That is, a part of the grinding liquid sprayed onto the upper surface 10B is reflected on the upper surface 10B, but the ejection port 31 is blocked by the wall portion 32 and returned to the upper surface 10B. In particular, in the present embodiment, by forming the protruding portion 36 in the supply device 3b, the ejection port 31 includes the wall portion 32, the wall surface of the notch portion 38b, the wall surface of the step portion 13 (the inner periphery of the peripheral wall portion 11). Since it is surrounded by the surface 12) and the upper surface 10B of the disk member 10, it is possible to suppress the reflected grinding fluid from scattering to the outside. The grinding liquid dammed up by the wall surface of the wall portion 32 and the notch portion 38b falls to the upper surface 10B of the disk member 10 due to gravity, and is guided to the inlet 17 by the centrifugal force of the disk member 10. The grinding fluid blocked by the wall surface of the stepped portion 13 is directly guided to the inflow port 17 by the centrifugal force of the disc member 10.
As described above, the grinding fluid reflected on the upper surface 10B of the disk member 10 can be guided to the inflow port 17 through the upper surface 10B or directly from the wall surface of the step portion 13. That is, according to the grinding device 1b having the above-described configuration, it is possible to suppress the grinding fluid from being scattered to the outside, and to efficiently guide it to the inlet. Therefore, the grinding fluid can be sufficiently supplied to the grinding wheel, and the supply amount of the grinding fluid and the generation of mist can be reduced.

  Further, in the grinding apparatus 1b having the above-described configuration, the grinding liquid guide surface 39 is provided in the notch 38b, so that as the grinding liquid advances along the rotation direction by the rotation of the grinding wheel 2, the surrounding atmosphere (the peripheral wall portion) 11 and a portion surrounded by the notch 38b) gradually increase in pressure. Accordingly, air is easily pushed out from the liquid supply hole 15, and the grinding liquid is pushed into the liquid supply hole 15 from the inlet 17 accordingly. Further, the grinding fluid itself is directly pushed to the grinding fluid guiding surface 39 and guided to the inflow port 17. As a result, the supply efficiency of the grinding fluid is greatly improved, so that the supply amount of the grinding fluid can be reduced.

(Third embodiment)
As shown in FIG. 6, in the grinding device 1c according to the third embodiment, the protruding portion 36c of the supply device 3c spreads out in a truncated cone shape and enters below the inclined portion of the peripheral wall portion 11c of the grinding wheel 2c. Specifically, the side wall surface 37c of the protruding portion 36c is formed by a tapered inclined surface whose diameter is increased toward the lower side. The inclination angle of the side wall surface 37c is equal to the inclination angle of the inner peripheral surface 12 of the peripheral wall portion 11c. The side wall surface 37c of the projecting portion 36c and the inner peripheral surface 12 of the peripheral wall portion 11c are opposed to each other with a gap, and a belt-like space 110 having a constant width is formed between the side wall surface 37c and the inner peripheral surface 12. . The side wall surface 37c and the inner peripheral surface 12 are parallel to each other when viewed in the cross-sectional direction. In addition, although the leftmost outermost side wall surface 37c is not actually visible in the cross-sectional line of FIG. 6, in order to explain a grinding fluid guiding surface 39c described later, it is shown by a virtual line (two-dot chain line).

  The shape of the notch 38c of the supply device 3c is substantially the same as that of the second embodiment, and the side wall surface at one end in the width direction (the side wall surface on the downstream side in the rotation direction of the disk member 10) is circumferential. It is formed to spread in the direction. Specifically, of the side wall surface 37c of the projecting portion 36c, the distance between the rear side wall surface 37ca of the notch portion 38c and the inner peripheral surface 12 of the peripheral wall portion 11c is a workpiece machining position from the periphery of the ejection port 31. The side wall surface 37ca of the notch 38c is formed so as to become shorter toward the periphery of P in the rotational direction of the disk member 10 (the side wall surface 37ca gradually approaches the inner peripheral surface 12). . Thus, the side wall surface 37ca that gradually approaches the inner peripheral surface 12 of the peripheral wall portion 11c constitutes the grinding fluid guiding surface 39c. The grinding fluid guide surface 39c is a curved surface smoothly connected from the innermost surface of the cutout portion 38c (the inner sidewall surface 37ca on the upstream side in the rotation direction) toward the outermost sidewall surface 37c of the protruding portion 36c. . The grinding fluid guide surface 39c is connected to the outermost side wall surface 37c of the protruding portion 36c in the vicinity of the workpiece processing position P. In the grinding liquid guiding surface 39c of the present embodiment, the innermost side wall surface 37ca of the cutout portion 38c is vertically connected to the upper surface and the lower surface, but the outermost side wall surface of the protruding portion 36c. As it goes to 37c, the lower surface spreads further outward than the upper surface, and the side wall surface 37ca is gradually inclined. In the vicinity of the workpiece machining position P, the side wall surface 37ca in the grinding fluid guiding surface 39c has an inclination angle equivalent to the outermost side wall surface 37c of the protruding portion 36c. In addition, you may make it incline so that a lower surface may spread outside rather than the upper surface from the innermost side wall surface 37ca of the notch part 38c.

  By the way, in this embodiment, in order that the protrusion part 36c may enter under the inclination part of the surrounding wall part 11c, the surrounding wall part 11c is divided | segmented and formed so that attachment or detachment is possible. Specifically, the peripheral wall portion 11c is divided into upper and lower portions with the same plane as the upper surface 10B of the disk member 10 as a boundary. Further, the upper divided body 111 of the peripheral wall portion 11c is divided into at least two portions in the circumferential direction, and is arranged so as to surround the protruding portion 36c from the outside. When the supply device 3c is installed in such a configuration, the upper divided body in a divided state after the supply device 3c is installed above the disk member 10 without the upper divided body 111 of the peripheral wall portion 11c. 111, the protrusion 36c is enclosed from the outside, and the upper divided body 111 is formed in a ring shape. In this state, the upper divided body 111 is fixed to the lower divided body 112 and integrated. According to such a procedure, the supply device 3c is installed in a state in which the protruding portion 36c enters below the inclined portion of the peripheral wall portion 11c.

  In addition, the division | segmentation state and installation process of each part are not limited to the said structure. For example, if the main body portion 33 and the protruding portion 36c of the supply device 3c are vertically divided, the upper divided body 111 may be formed in an integral ring shape without being divided in the circumferential direction. When installing the supply device 3c with such a configuration, after the protruding portion 36c of the supply device 3c is installed above the disk member 10 without the upper divided body 111 of the peripheral wall portion 11c, the upper division is performed outside. The body 111 is installed. Then, the upper divided body 111 may be fixed and integrated with the lower divided body 112, and the protrusion 36c may be fixed and integrated with the main body 33 of the supply device 3c. According to such a procedure, the supply device 3c is installed in a state in which the protruding portion 36c enters below the inclined portion of the peripheral wall portion 11c.

  According to the configuration of the present embodiment, as in the second embodiment, the grinding fluid guide surface 39c is provided in the notch 38c, so that the grinding fluid advances along the rotational direction by the rotation of the grinding wheel 2. Thus, the pressure in the surrounding atmosphere (portion surrounded by the peripheral wall portion 11 and the notch portion 38b) gradually increases. Accordingly, air is easily pushed out from the liquid supply hole 15, and the grinding liquid is pushed into the liquid supply hole 15 from the inlet 17 accordingly. Further, the grinding fluid itself is directly pushed to the grinding fluid guiding surface 39 and guided to the inflow port 17. As a result, the supply efficiency of the grinding fluid is greatly improved, so that the supply amount of the grinding fluid can be reduced. Furthermore, in this embodiment, the lower part of the protrusion part 36c enters the lower side of the surrounding wall part 11c, and the strip | belt-shaped space 110 narrower than the space of 2nd embodiment is formed between the side wall surface 37c and the inner peripheral surface 12. Therefore, the pressure in the ambient atmosphere of the grinding fluid is further increased. Therefore, it becomes easier for the grinding liquid to be pushed away from the inlet 17 into the liquid supply hole 15. Further, the belt-like space 110 has an inclination angle equivalent to that of the liquid supply hole 15 and is linearly connected to the liquid supply hole 15, so that the grinding liquid easily flows from the belt-like space 110 into the liquid supply hole 15. .

  The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention. For example, in the above-described embodiment, the vertical grinding apparatuses 1a and 1b in which the rotation shaft 4 is arranged in the vertical direction have been described as an example. However, in the present invention, the horizontal grinding in which the rotation shaft is arranged in the horizontal direction is described. It can also be applied to an apparatus. In this case, a supply apparatus may be arrange | positioned only on the single side | surface of a grinding stone, and may be arrange | positioned on both surfaces.

  Moreover, in the said embodiment, while the disk member 10 can rotate between the bottom face 35 of supply apparatus 3a, 3b and the surface of the surrounding wall part 11 of the disk member 10, grinding fluid is scattered outside. A gap is provided to such an extent that no sealing is performed, but a sealing means may be provided in this gap. As the sealing means, it is sufficient that the disk member 10 is rotatable, and an air seal or the like may be used. With such a configuration, it is possible to reliably prevent the grinding fluid from scattering from the gap between the bottom surface 35 of the supply device 3a and the top surface of the peripheral wall portion 11 of the disc member 10. Further, since the pressure around the inlet 17 is increased, the grinding liquid can be poured into the liquid supply hole 15 more efficiently.

  Furthermore, the number, hole diameter, and inclination angle of the liquid supply holes 15 of the grinding wheel 2 are not limited to the above embodiment. Further, the shape and number of the liquid supply flow paths 30 of the supply devices 3a and 3b are not limited to the above embodiment.

DESCRIPTION OF SYMBOLS 1a Grinding device 1b Grinding device 2 Grinding wheel 3a Supply device 3b Supply device 10 Disk member 10A Lower surface (one side surface)
10B Upper surface (the other side)
11 peripheral wall part 12 inner peripheral surface (peripheral wall surface)
DESCRIPTION OF SYMBOLS 13 Level difference part 15 Liquid supply hole 16 Discharge port 17 Inflow port 20 Grinding stone member 30 Liquid supply flow path 31 Jet port 32 Wall part 36 Projection part 37 Side wall surface 38a Notch part 38b Notch part 39 Grinding fluid guide surface W Work P Workpiece Processing position

Claims (3)

A grinding apparatus comprising a grinding wheel comprising a disk member and an annular grinding wheel member provided on an outer peripheral edge of the disk member, and a supply device for supplying a grinding liquid to the grinding wheel,
The disc member has a liquid supply hole penetrating from one side surface to the other side surface,
The liquid supply hole is formed such that an inflow port opened on the other side surface is formed on an inner side in a radial direction of the disk member, rather than an ejection port opened on an outer peripheral edge portion of the one side surface,
In the other side surface, a peripheral wall portion raised along an outer peripheral edge portion of the disc member is formed on a radially outer portion of the disc member from the inflow port,
The supply device has a liquid supply channel provided with a jet port facing the other side surface on the radially inner side of the disc member with respect to the peripheral wall portion, and faces the surface of the peripheral wall portion and the other side surface. A wall portion covering a step portion between the peripheral wall portion and the other side surface ,
The grinding apparatus according to claim 1, wherein a protrusion that protrudes toward the other side surface of the disk member is formed in the supply device. Some of the side wall surface of the front Symbol protrusion to claim 1, characterized in that said than spout located on the center side of the disc member and faces the inner peripheral wall surface of the peripheral wall portion The grinding apparatus as described. A grinding fluid guide surface is formed on the projecting portion so that the distance between the side wall surface of the projecting portion and the peripheral wall surface decreases as the disc member rotates in the rotational direction from the jet port toward the workpiece machining position. The grinding apparatus according to claim 2, wherein the grinding apparatus is provided.

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